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  1. J

    Positive but confusing experience after lowering filtering time

    So I have a pretty big 20 x 40 pool that we got redone last summer in our new-to-us house. The pool company said a good rule of thumb for filtering time was at least 2800 rpm for as many hours as the average daily temps. So 8 hours a day in the 80's, 10 hours in the 100's, etc. Well we have a...